Nathan stephens



(No ModeL) N. STEPHENS 8v M. L. RITOHIB.

METHOD 0F UTILIZING @Ln BOILER TUBES,

Patented June 2, 1885.

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UNITED STATES Parent* trice..

NATHAN STEPHENS, OF BROOKLYN, AND MATTHEW L. BITCHIE, OF NEYV YORK, ASSIGNOR-S TO THE EAGLE TUBE COMPANY, OF NEN/V YORK, N. Y.

METHOD OF UTILIZING OLD BOILER-TUBES.

SPECIFICATION forming part of Letters Patent No. 319,144, dated June 2, 1885.

Application tiled November 26, 1884. (No modeLl To all whom, it may concern:

Be it known that we, NATHAN STEPHENS, of Brooklyn, in the county of Kings and State ot'New York, and MATTHEW L. RrroHiE, of

the city and State of N ew York, have invented an Improvement in Utilizing Old Boiler- Tubes, ot' which the following is a specification.

Iron boiler-tubes are of thin metal, and

Io when they are removed from the boiler and others substituted a large percentage of such old tubes are comparatively valueless, as they are too thin to cut upon them the ordinary screw-threads used in gas and water ttings,

i 5 and they are too soft to withstand the strain usually employedin screwing together ordinary pipes, or in packing joints with lead; hence such old boiler-tubes are not ordinarily merchantable.

2o Our invention is made with reference to the utilizing of these boiler-tubes and the production of a tube that is especiallyy adapted to ventilator-pipes from watercl0sets and rooms, for waste or sewer pipes, and for water-leaders for buildings, for waterfpipes for irrigation, and other purposes.

In the drawing we have represented our improvement by a sectional view.

The tubes, after they are removed from the 3o boiler, are thoroughly cleaned from scale and foreign matter. jlhe ends of the pipe are cut olf true when necessary, and a screw-thread is formed at each end ot' the tube by bending up such thread in a manner similar to that pursued in the manufacture of sheet-metal screws. Usually the screwn at one'end is pressed inwardly, so as to reduce the size of the screw to less than that ot' the pipe b, as seen in the sectional drawing, and at the other end the pipe is enlarged and the screw formed +o in the same way as at c, so that the end a of one pipe will screw into the end c of the other pipe.

lt' it is desired to maintain the full internal size ofthe tube, the ends may be swelled before forming the screw-thread thereon.

The metallic pipe may be galvanized or coated with asphalt, varnish, or similar material to prevent rust.

lVhen the lengths of pipe are screwed to- 5o gether, it can be done with facility, and the joint is made tight by red lead or asphalt, or similar material applied to the surfaces before they are screwed together.

This pipe is suiliciently strong to withstand any pressure arising in sewer or waste pipes in buildings, or in the water-leaders. Pipes for these purposes are extensively employed within recesses in the walls Vof buildings, and our improved pipe occupies much less space 6o than the cast-iron pipes heretofore used. It isinore easily applied and less liable to be cracked or injured, and the hubs and leaded joints necessary in cast-iron pipes are dispensed with.

NVe claim as our invention- The method herein specified of utilizing old iron boiler-tubes, consisting in cleaning the surface, bending sheet-metal lscrews at each end, and coating the same with aprotecting material, substantially as specified.

Signed by us this 24th day of November, A. D. 1884.

NATHAN STEPHENS. M. L. RlTGHlE. YVitn esses GEO. T. Pinoirnnr, WILLIAM G. MOTT. 

